Apparatus

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sensors Mode-S transponder

781B5B

ICAO 24-bit transponder address · allocated to China

Currently assigned to B-322Y · AIRBUS A-350-900

Hex
781B5B
Octal
36015533
Decimal
7,871,323
Country
CN
Tail
B-322Y
Type
A359
No current signal · last broadcast Jul 26, 22:15 UTC
Flights observed
106
Distinct callsigns
20
Country
CN
Last broadcast
Jul 26, 22:15 UTC

Last known position

Most recent position reported by Mode-S 781B5B.

Country allocation

The ICAO 24-bit address 781B5B falls within the block assigned to China (CN) by ICAO Annex 10, Volume III. Every aircraft registered in China receives a permanent address from this block at the time of registration; the address stays with the airframe even if the aircraft is re-registered to a different operator within the country.

Callsign history 20 distinct

Callsign Airline Flights Last seen
CCA877 Air China 9 2026-04-23
CCA912 Air China 8 2026-04-27
CCA911 Air China 7 2026-04-26
CCA868 Air China 7 2026-04-23
CCA878 Air China 5 2026-04-24
CCA867 Air China 5 2026-04-21
CCA846 Air China 5 2026-04-16
CCA845 Air China 5 2026-04-16
CCA949 Air China 3 2026-07-22
CCA446 Air China 3 2026-07-23
CCA424 Air China 3 2026-07-25
CCA1329 Air China 3 2026-05-02
CCA861 Air China 2 2026-04-19
CCA852 - 2 2026-07-20
CCA423 Air China 2 2026-07-25
CCA1475 Air China 2 2026-07-21
CCA1394 Air China 2 2026-05-15
CCA1383 - 2 2026-07-12
CCA1342 - 2 2026-07-19
CCA1341 Air China 2 2026-07-19

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-25 CCA424 LHR → TFU Jul 25, 22:50 UTCJul 26, 22:15 UTC23h 26m
2026-07-25 CCA424 LHR → TFU Jul 25, 21:15 UTCJul 25, 23:50 UTC2h 35m
2026-07-25 CCA423 TFU → LHR Jul 25, 11:45 UTCJul 25, 18:35 UTC6h 50m
2026-07-23 CCA446 MXP → TFU Jul 23, 11:30 UTCJul 23, 18:00 UTC6h 30m
2026-07-22 CCA949 PEK → MXP Jul 22, 20:55 UTCJul 23, 03:45 UTC6h 50m
2026-07-21 CCA1476 KMG → PEK Jul 21, 07:40 UTCJul 21, 08:00 UTC20m
2026-07-21 CCA1475 PEK → KMG Jul 21, 00:05 UTCJul 21, 00:30 UTC25m
2026-07-20 CCA852 - Jul 20, 20:50 UTCJul 20, 21:10 UTC20m
2026-07-20 CCA852 - Jul 20, 12:00 UTCJul 20, 18:25 UTC6h 25m
2026-07-19 CCA851 - Jul 19, 22:35 UTCJul 19, 23:10 UTC35m
2026-07-19 CCA1342 - Jul 19, 11:40 UTCJul 19, 12:00 UTC20m
2026-07-19 CCA1342 - Jul 19, 09:20 UTCJul 19, 09:30 UTC10m
2026-07-19 CCA1341 PEK → SZX Jul 19, 07:00 UTCJul 19, 07:15 UTC15m
2026-07-19 CCA1341 PEK → SZX Jul 19, 04:35 UTCJul 19, 04:45 UTC10m
2026-07-18 CCA1563 PEK → SHA Jul 18, 12:00 UTCJul 18, 12:10 UTC10m
2026-07-18 CCA9502 - Jul 18, 09:30 UTCJul 18, 09:55 UTC25m
2026-07-16 CCA424 - Jul 16, 21:25 UTCJul 17, 04:04 UTC6h 40m
2026-07-16 CCA423 - Jul 16, 12:09 UTCJul 16, 18:59 UTC6h 50m
2026-07-15 CCA446 - Jul 15, 14:50 UTCJul 16, 12:55 UTC22h 5m
2026-07-15 CCA446 - Jul 15, 13:00 UTCJul 16, 12:44 UTC23h 45m
2026-07-14 CCA949 - Jul 14, 21:00 UTCJul 15, 04:05 UTC7h 4m
2026-07-14 CCA949 - Jul 14, 17:55 UTCJul 14, 18:05 UTC10m
2026-07-14 CCA1402 - Jul 14, 14:30 UTCJul 14, 14:55 UTC25m
2026-07-14 CCA1401 - Jul 14, 08:10 UTCJul 14, 08:40 UTC30m
2026-07-13 CCA1475 - Jul 13, 00:10 UTCJul 13, 08:01 UTC7h 50m
2026-07-12 CCA1384 - Jul 12, 07:20 UTCJul 12, 07:35 UTC15m
2026-07-12 CCA1383 - Jul 12, 02:30 UTCJul 12, 03:01 UTC30m
2026-05-15 CCA1394 SZX → PEK May 15, 04:40 UTCMay 15, 04:55 UTC15m
2026-05-13 CCA1383 PEK → SZX May 13, 04:45 UTCMay 13, 05:05 UTC20m
2026-05-11 CCA1313 PEK → SZX May 11, 05:35 UTCMay 11, 05:55 UTC20m
2026-05-09 CCA1359 PEK → CAN May 9, 23:30 UTCMay 9, 23:50 UTC20m
2026-05-09 CCA1565 PEK → SHA May 9, 10:50 UTCMay 9, 11:00 UTC10m
2026-05-09 CCA1394 SZX → PEK May 9, 04:00 UTCMay 9, 04:10 UTC10m
2026-05-08 CCA1393 PEK → SZX May 8, 23:00 UTCMay 8, 23:20 UTC20m
2026-05-08 CCA1421 PEK → CTU May 8, 00:44 UTCMay 8, 01:04 UTC20m
2026-05-06 CCA1314 SZX → PEK May 6, 10:40 UTCMay 6, 10:50 UTC10m
2026-05-06 CCA1314 SZX → PEK May 6, 08:15 UTCMay 6, 08:30 UTC15m
2026-05-06 CCA1313 PEK → SZX May 6, 03:20 UTCMay 6, 03:40 UTC20m
2026-05-05 CCA1426 CTU → PEK May 5, 16:06 UTCMay 5, 16:15 UTC10m
2026-05-05 CCA1415 PEK → CTU May 5, 01:50 UTCMay 5, 10:30 UTC8h 40m
2026-05-04 CCA1308 SZX → PEK May 4, 02:45 UTCMay 4, 02:54 UTC10m
2026-05-03 CCA1307 PEK → SZX May 3, 14:05 UTCMay 3, 14:25 UTC20m
2026-05-02 CCA1329 PEK → CAN May 2, 13:15 UTCMay 2, 13:40 UTC25m
2026-05-01 CCA1329 PEK → CAN May 1, 13:10 UTCMay 1, 13:35 UTC25m
2026-05-01 CCA1317 TSN → CAN May 1, 02:20 UTCMay 1, 02:40 UTC20m
2026-04-30 CCA1414 KMG → PEK Apr 30, 15:00 UTCApr 30, 15:20 UTC20m
2026-04-30 CCA1413 PEK → KMG Apr 30, 07:40 UTCApr 30, 08:05 UTC25m
2026-04-29 CCA1337 PEK → SZX Apr 29, 10:10 UTCApr 29, 10:20 UTC10m
2026-04-28 CCA1301 PEK → CAN Apr 28, 07:25 UTCApr 28, 23:40 UTC16h 15m
2026-04-27 CCA1329 PEK → CAN Apr 27, 13:10 UTCApr 27, 13:30 UTC20m

About Mode-S

A Mode-S transponder code (also called an "ICAO 24-bit address" or "hex code") is a 6-character hexadecimal identifier permanently assigned to an aircraft when it's first registered. Unlike callsigns (which change with each flight) or registrations (which can change if an aircraft is sold internationally), the Mode-S address stays with the airframe for the life of the aircraft in that country.

Every ADS-B transmission from an aircraft includes its Mode-S address, making it the most reliable way to identify a specific airframe. Flight-tracking services like Apparatus use the Mode-S address as the primary key for tying position broadcasts, callsigns, and ownership records together.

Prefer a tail-number view? See the B-322Y page for operator, model, and routing details .

Mode-S 781B5B frequently asked

What is Mode-S code 781B5B?
781B5B is an ICAO 24-bit transponder address. Allocated to China. Assigned to B-322Y.
Where is Mode-S 781B5B registered?
Mode-S code 781B5B is allocated to China (CN). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 781B5B broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 22:15 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 781B5B, octal 36015533, decimal 7,871,323.
What flights does 781B5B operate?
Mode-S 781B5B has broadcast 20 distinct callsigns, including CCA877, CCA912, CCA911, CCA868, CCA878.